﻿<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>awardRotate.js实现的jQuery手机端转盘抽奖</title>

<style type="text/css">
	body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,table,td,img,div{margin:0;padding:0;border:0;}
	body{color:#333; font-size:12px;font-family:"Microsoft YaHei"}
	ul,ol{list-style-type:none;}
	select,input,img,select{vertical-align:middle;}
	input{ font-size:12px;}
	a{ text-decoration:none; color:#000;}
	a:hover{color:#c00; text-decoration:none;}
	.clear{clear:both;}

	/* 大转盘样式 */
	.banner{display:block;width:95%;margin-left:auto;margin-right:auto;margin-bottom: 20px;}
	.banner .turnplate{display:block;width:100%;position:relative;}
	.banner .turnplate canvas.item{width:100%;}
	.banner .turnplate img.pointer{position:absolute;width:36%;height:40%;left:32%;top:28%;}
	.more{display: block;width: 100%;position: fixed;top: 0;left: 0;height: 150px;}
	.cloud{position: fixed;left: 0;top: 70%;width: 150px;}
	.cloud2{position: fixed;right: 0;top: 32%;width: 50px;}
	.cloud3{position: fixed;left: 0;top: 30%;width: 100px;}
	@media screen and (max-width: 320px) {
		.cloud{position: fixed;left: 0;top: 70%;width: 150px;}
		.cloud2{position: fixed;right: 0;top: 30%;width: 50px;}
		.cloud3{position: fixed;left: 0;top: 23%;width: 100px;}
	}
	@media screen and (min-width: 321px) and (max-width: 375px) {
		.cloud{position: fixed;left: 0;top: 72%;width: 150px;}
		.cloud2{position: fixed;right: 0;top: 32%;width: 50px;}
		.cloud3{position: fixed;left: 0;top: 25%;width: 100px;}
	}
	@media screen and (min-width: 376px) {
		.cloud{position: fixed;left: 0;top: 68%;width: 150px;}
		.cloud2{position: fixed;right: 0;top: 32%;width: 50px;}
		.cloud3{position: fixed;left: 0;top: 25%;width: 100px;}
	}
	@media screen and (max-height: 480px) {
		.cloud{position: fixed;left: 0;top: 81%;width: 150px;}
		.cloud2{position: fixed;right: 0;top: 35%;width: 50px;}
		.cloud3{position: fixed;left: 0;top: 27%;width: 100px;}
	}

	#mark{width: 100%;height: 100%;background: rgba(0,0,0,0.5);position: fixed;top: 0;left: 0;display: none;}
	.red-img{position: fixed;top: 10%;left: 5%;width: 90%;}
</style>
	<!--<script>alert(1)</script>-->
<script type="text/javascript" src="js/jquery-1.10.2.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.1/jquery.easing.min.js"></script>
<script type="text/javascript" src="js/awardRotate.js"></script>

<script type="text/javascript">
// var turnplate={
// 		restaraunts:[],				//大转盘奖品名称
// 		colors:[],					//大转盘奖品区块对应背景颜色
// 		outsideRadius:192,			//大转盘外圆的半径
// 		textRadius:155,				//大转盘奖品位置距离圆心的距离
// 		insideRadius:68,			//大转盘内圆的半径
// 		startAngle:0,				//开始角度
//    randomRate :["35%", '35%', '30%', '0%', '0%', '0%', '0%'], //小心设置按100%分配
// 		bRotate:false				//false:停止;ture:旋转
// };
var turnplate = {
    restaraunts: [],				//大转盘奖品名称
    colors: [],					//大转盘奖品区块对应背景颜色
    outsideRadius: 211,			//大转盘外圆的半径
    textRadius: 155,				//大转盘奖品位置距离圆心的距离
    insideRadius: 68,			//大转盘内圆的半径
    startAngle: 0,				//开始角度
    randomRate: [],              //控制获奖率，百分制(相加需等于100%)，对应restaraunts(顺序需要保持一致)，
    bRotate: false,			//false:停止;ture:旋转
    trunNum: [],//概率奖品 编号
    type: [],   //奖品类型编号    0实物 1 积分 2 谢谢
};

$(document).ready(function(){
	//动态添加大转盘的奖品与奖品区域背景颜色
	turnplate.restaraunts = ["碧根果一袋", "年货红包", "水果拼盘300元月卡", "2元现金红包", "夏威夷果一袋", "3元现金红包", "松子一袋 ", "5元现金红包"];
	turnplate.colors = ["#FFFFFF","#5fcbd5", "#FFFFFF", "#5fcbd5", "#FFFFFF","#5fcbd5", "#FFFFFF", "#5fcbd5" ];
    turnplate.randomRate = ["35%", '35%', '30%', '0%', '0%', '0%', '0%','0%'];  //小心设置按100%分配

	var rotateTimeOut = function (){
		$('#wheelcanvas').rotate({
			angle:0,
			animateTo:2160,
			duration:8000,
			callback:function (){
				alert('网络超时，请检查您的网络设置！');
			}
		});
	};

	//旋转转盘 item:奖品位置; txt：提示语;
	var rotateFn = function (item, txt ){
		var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length*2));
		if(angles<270){
			angles = 270 - angles;
		}else{
			angles = 360 - angles + 270;
		}
		$('#wheelcanvas').stopRotate();

		$('#wheelcanvas').rotate({
			angle:0,
            animateTo:angles+720,
			// duration:8000,
            callback: function(){
			    console.log(txt)
                turnplate.bRotate = !turnplate.bRotate;
			},
            easing: function (x,t,b,c,d){
                return -c*( (t=t/d-1)*t*t*t-1)+b ;
            }

		});
	};
    var rotation = function () {
        $('#wheelcanvas').rotate({
            angle:0,
            animateTo:1080,
            callback: rotation,
            easing: function (x,t,b,c,d){
                return (t/d)*c ;
            }
        })
    }
	$('.pointer').click(function (){
		if(turnplate.bRotate)return;
		turnplate.bRotate = !turnplate.bRotate;
		//获取随机数(奖品个数范围内)
		var item = rnd(turnplate.randomRate);
		//奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]

        rotation();
        setTimeout(function(){
            rotateFn(item, turnplate.restaraunts[item-1]);
		},2000)
		console.log(item);
	});
});


//生成随机模块，只能为整数
function rnd(rate) {
    var random = Math.floor(Math.random() * 100);
    var myRandom = [];
    var randomList = [];
    var randomParent = [];
    for (var i = 0; i < 100; i++) {
        myRandom.push(parseInt([i]) + 1);
    }
    for (var i = 0; i < rate.length; i++) {
        var temp = [];
        var start = 0;
        var end = 0;
        randomList.push(parseInt(rate[i].split('%')[0]));
        for (var j = 0; j < randomList.length; j++) {
            start += randomList[j - 1] || 0;
            end += randomList[j];
        }
        temp = myRandom.slice(start, end);
        randomParent.push(temp)

    }

    for (var i = 0; i < randomParent.length; i++) {

        if ($.inArray(random, randomParent[i]) >= 0) {
            return (i + 1);
        }
    }
    //console.log(myRandom, randomList, randomParent);
}

//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
window.onload=function(){
	drawRouletteWheel();
};

function drawRouletteWheel() {
  var canvas = document.getElementById("wheelcanvas");
  if (canvas.getContext) {
	  //根据奖品个数计算圆周角度
	  var arc = Math.PI / (turnplate.restaraunts.length/2);
	  var ctx = canvas.getContext("2d");
	  //在给定矩形内清空一个矩形
	  ctx.clearRect(0,0,422,422);
	  //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式
	  ctx.strokeStyle = "#FFBE04";
	  //font 属性设置或返回画布上文本内容的当前字体属性
	  ctx.font = 'bold 18px Microsoft YaHei';
	  for(var i = 0; i < turnplate.restaraunts.length; i++) {
		  var angle = turnplate.startAngle + i * arc;
		  ctx.fillStyle = turnplate.colors[i];
		  ctx.beginPath();
		  //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）
		  ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
		  ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
		  ctx.stroke();
		  ctx.fill();
		  //锁画布(为了保存之前的画布状态)
		  ctx.save();

		  //改变画布文字颜色
		  var b = i+2;
		  if(b%2){
		  	 ctx.fillStyle = "#FFFFFF";
		  	}else{
		  	 ctx.fillStyle = "#E5302F";
		  	};

		  //----绘制奖品开始----


		  var text = turnplate.restaraunts[i];
		  var line_height = 17;
		  //translate方法重新映射画布上的 (0,0) 位置
		  ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

		  //rotate方法旋转当前的绘图
		  ctx.rotate(angle + arc / 2 + Math.PI / 2);

		  /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
		  if(text.indexOf("盘")>0){//判断字符进行换行
			  var texts = text.split("盘");
			  for(var j = 0; j<texts.length; j++){
				  ctx.font = j == 0?'bold 20px Microsoft YaHei':'bold 18px Microsoft YaHei';
				  if(j == 0){
					  ctx.fillText(texts[j]+"盘", -ctx.measureText(texts[j]+"盘").width / 2, j * line_height);
				  }else{
					  ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height*1.2); //调整行间距
				  }
			  }
		  }else if(text.indexOf("盘") == -1 && text.length>8){//奖品名称长度超过一定范围
			  text = text.substring(0,8)+"||"+text.substring(8);
			  var texts = text.split("||");
			  for(var j = 0; j<texts.length; j++){
				  ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
			  }
		  }else{

			  //在画布上绘制填色的文本。文本的默认颜色是黑色

			  //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
			  ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
		  }

		  //添加对应图标

		  if(text.indexOf(turnplate.restaraunts[0])>=0){
			  var img= document.getElementById("diy1-img");
			  img.onload=function(){
				  ctx.drawImage(img,-35,20);
			  };
			  ctx.drawImage(img,-35,20);
		  };
		  if(text.indexOf(turnplate.restaraunts[1])>=0){
			  var img= document.getElementById("shan-img");
			  img.onload=function(){
				  ctx.drawImage(img,-35,20);
			  };
			  ctx.drawImage(img,-35,20);
		  };
		  if(text.indexOf(turnplate.restaraunts[2])>=0){
			  var img= document.getElementById("diy5-img");
			  img.onload=function(){
				  ctx.drawImage(img,-25,35);
			  };
			  ctx.drawImage(img,-30,35);
		  };
		  if(text.indexOf(turnplate.restaraunts[3])>=0){
			  var img= document.getElementById("shan-img");
			  img.onload=function(){
				  ctx.drawImage(img,-35,20);
			  };
			  ctx.drawImage(img,-35,20);
		  };
		  if(text.indexOf(turnplate.restaraunts[4])>=0){
			  var img= document.getElementById("diy3-img");
			  img.onload=function(){
				  ctx.drawImage(img,-30,20);
			  };
			  ctx.drawImage(img,-30,20);
		  };
		  if(text.indexOf(turnplate.restaraunts[5])>=0){
			  var img= document.getElementById("shan-img");
			  img.onload=function(){
				  ctx.drawImage(img,-35,20);
			  };
			  ctx.drawImage(img,-35,20);
		  };
		  if(text.indexOf(turnplate.restaraunts[6])>=0){
			  var img= document.getElementById("diy2-img");
			  img.onload=function(){
				  ctx.drawImage(img,-30,20);
			  };
			  ctx.drawImage(img,-30,20);
		  };

		  if(text.indexOf(turnplate.restaraunts[7])>=0){
			  var img= document.getElementById("shan-img");
			  img.onload=function(){
				  ctx.drawImage(img,-35,20);
			  };
			  ctx.drawImage(img,-35,20);
		  };


		  //把当前画布返回（调整）到上一个save()状态之前
		  ctx.restore();
		  //----绘制奖品结束----
	  }
  }
};



</script>
</head>
<body style="background:url(images/body_bg2.jpg);background-size:cover;">
<img src="images/4.png" id="shan-img" style="display:none;" />
<img src="images/3.png" id="diy2-img" style="display:none;" />
<img src="images/5.png" id="diy1-img" style="display:none;" />
<img src="images/6.png" id="diy3-img" style="display:none;" />
<img src="images/7.png" id="diy4-img" style="display:none;" />
<img src="images/7.png" id="diy5-img" style="display:none;" />
<div class="banner" style="margin-top: 35%">
	<div class="turnplate" style="background-image:url(images/cj_bg.png);background-size:100% 100%;">
		<canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
		<img class="pointer" src="images/jt2.png"/>
	</div>
</div>
<a href="#" class="more"></a>
<img src="images/9.png" class="cloud">
<img src="images/10.png" class="cloud2">
<img src="images/11.png" class="cloud3">


</body>
</html>
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